Vendor autoload is not found.
Please run 'composer install' under application root directory in magento2.

When we try to install magento for the first time in our local machine or system where we can create a development environment for practise, while creating this environment we will need to download magento2, apache server, mysql database. After setting up the above mentioned required software, we will try to create a magento instance, while trying to set the Instance we will get the following error
Vendor autoload is not found. Please run 'composer install' under application root directory in magento2.
To solve the Vendor autoload is not found. Please run 'composer install' under application root directory.

The below mentioned steps will help to solve the error. You can follow the below mentioned steps to solve the following error

Solution :Vendor autoload is not found.
Please run 'composer install' under application root directory in magento2.